38290891 has 2 divisors, whose sum is σ = 38290892. Its totient is φ = 38290890.

The previous prime is 38290877. The next prime is 38290943. The reversal of 38290891 is 19809283.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38290891 - 2⁹ = 38290379 is a prime.

It is not a weakly prime, because it can be changed into another prime (38290801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19145445 + 19145446.

It is an arithmetic number, because the mean of its divisors is an integer number (19145446).

Almost surely, 2^38290891 is an apocalyptic number.

38290891 is a deficient number, since it is larger than the sum of its proper divisors (1).

38290891 is an equidigital number, since it uses as much as digits as its factorization.

38290891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 38290891 is about 6187.9633967890. The cubic root of 38290891 is about 337.0532279509.

The spelling of 38290891 in words is "thirty-eight million, two hundred ninety thousand, eight hundred ninety-one".